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package pods
import (
"fmt"
"io"
"io/ioutil"
"os"
"github.com/containers/common/pkg/completion"
"github.com/containers/podman/v4/cmd/podman/common"
"github.com/containers/podman/v4/cmd/podman/registry"
"github.com/containers/podman/v4/cmd/podman/utils"
"github.com/containers/podman/v4/pkg/domain/entities"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
var (
kubeOptions = entities.GenerateKubeOptions{}
kubeFile = ""
kubeDescription = `Command generates Kubernetes Pod, Service or PersistenVolumeClaim YAML (v1 specification) from Podman containers, pods or volumes.
Whether the input is for a container or pod, Podman will always generate the specification as a pod.`
kubeCmd = &cobra.Command{
Use: "kube [options] {CONTAINER...|POD...|VOLUME...}",
Short: "Generate Kubernetes YAML from containers, pods or volumes.",
Long: kubeDescription,
RunE: kube,
Args: cobra.MinimumNArgs(1),
ValidArgsFunction: common.AutocompleteForKube,
Example: `podman generate kube ctrID
podman generate kube podID
podman generate kube --service podID
podman generate kube volumeName
podman generate kube ctrID podID volumeName --service`,
}
)
func init() {
registry.Commands = append(registry.Commands, registry.CliCommand{
Command: kubeCmd,
Parent: generateCmd,
})
flags := kubeCmd.Flags()
flags.BoolVarP(&kubeOptions.Service, "service", "s", false, "Generate YAML for a Kubernetes service object")
filenameFlagName := "filename"
flags.StringVarP(&kubeFile, filenameFlagName, "f", "", "Write output to the specified path")
_ = kubeCmd.RegisterFlagCompletionFunc(filenameFlagName, completion.AutocompleteDefault)
flags.SetNormalizeFunc(utils.AliasFlags)
}
func kube(cmd *cobra.Command, args []string) error {
report, err := registry.ContainerEngine().GenerateKube(registry.GetContext(), args, kubeOptions)
if err != nil {
return err
}
content, err := ioutil.ReadAll(report.Reader)
if err != nil {
return err
}
if r, ok := report.Reader.(io.ReadCloser); ok {
defer r.Close()
}
if cmd.Flags().Changed("filename") {
if _, err := os.Stat(kubeFile); err == nil {
return errors.Errorf("cannot write to %q; file exists", kubeFile)
}
if err := ioutil.WriteFile(kubeFile, content, 0644); err != nil {
return errors.Wrapf(err, "cannot write to %q", kubeFile)
}
return nil
}
fmt.Println(string(content))
return nil
}
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